<template>
  <div class="updater-wrap">
    <el-progress
      v-if="loading"
      type="circle"
      :percentage="percent"
      :width="180"
    ></el-progress>
    <el-upload
      v-else
      class="avatar-uploader"
      action=""
      :show-file-list="false"
      :before-upload="beforeAvatarUpload"
      :auto-upload="true"
      :http-request="imageUpdater"
    >
      <img v-if="value" :src="value" class="avatar" />
      <i v-else class="el-icon-plus avatar-uploader-icon"></i>
    </el-upload>
  </div>
</template>
<script lang="ts">
import Vue from 'vue'
import { imageUpdate } from '@/apis/course'
export default Vue.extend({
  name: 'image-update',
  props: {
    value: {
      type: String,
      default: ''
    }
  },
  data() {
    return {
      loading: false,
      percent: 0
    }
  },
  methods: {
    beforeAvatarUpload(file: any) {
      const isJPG = file.type === 'image/jpeg'
      const isLt2M = file.size / 1024 / 1024 < 2

      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG 格式!')
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 2MB!')
      }
      return isJPG && isLt2M
    },
    async imageUpdater(res: any) {
      this.loading = true
      const form = new FormData()
      form.append('file', res.file)
      const { data } = await imageUpdate(form, (e) => {
        this.percent = Math.floor((e.loaded / e.total) * 100)
      })
      if (data.code === '000000') {
        this.$emit('input', data.data.name)
      }
      this.loading = false
      this.percent = 0
    }
  }
})
</script>
<style lang="scss" scoped>
::v-deep .avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
::v-deep .avatar-uploader .el-upload:hover {
  border-color: #409eff;
}
::v-deep .avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  line-height: 178px;
  text-align: center;
}
::v-deep .avatar {
  width: 178px;
  height: 178px;
  display: block;
}
</style>
